By Lawrence Hurley WASHINGTON (Reuters) - The U.S. Supreme Court will weigh a second major case targeting President Barack Obama's healthcare law on Wednesday when it considers a conservative challenge to tax subsidies critical to the measure's implementation. If a majority of the nine justices rules against the administration, up to 7.5 million people in at least 34 states would lose subsidies that help low- and moderate-income people afford private health insurance, unless Congress or the affected states act immediately. Such a ruling could also have a broader impact by deterring younger, healthier people from buying health insurance, which would lead to premiums rising for older, less healthy people who need healthcare most, said Rand Corporation economist Christine Eibner. The Democratic-backed law, narrowly passed by Congress over unified Republican opposition, aimed to help millions of Americans who lacked any health insurance afford coverage.

A Russian lawyer for Edward Snowden said on Tuesday the fugitive former U.S. spy agency contractor who leaked details of the government's mass surveillance programs was working with American and German lawyers to return home. Anatoly Kucherena, who has links to the Kremlin, was speaking at a news conference to present a book he has written about his client. Russia has repeatedly refused to extradite him.

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